Does cranberry juice reduce risk of urinary tract infections?
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Cranberry juice cocktail reduces the rate of bacteruria with pyuria in elderly women, although the clinical significance of this finding is unclear. Cranberry products reduce the frequency of urinary tract infection (UTI) among women who frequently contract UTIs. However, they are not effective for patients with catheters. (SOR B, based on randomized controlled trials [RCTs] with heterogeneity.) Concerns have been raised about a possible interaction between warfarin and cranberry juice.
Evidence Based Practice 11(3): 07-08.